George hogg



(No Model.)

G. HOGG.

GAR VENTILATOR. No. 447,071. Patented Feb. 24, 1891;

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UNITED STATES PATENT OFFICE.

GEORGE IIOGG, OF NElV YORK, N. Y.

CAR-VENT! L ATO R.

SPECIFICATION forming part of Letters Patent No. 447,071, dated February 24, 1891. Application filed June I2, 1890. Serial No. 355,168. (No model.)

a To all whom, it may concern:

Be it known that I, GEORGE IIOGG, of the city, county, and State of New York, a citizen of the United States, have invented certain new and useful Improvements in Gar-Ventilators, of which the following is a specification.

This invention relates to an improved carventilator of that class in which the air in the car is exhausted by creating a partial vacuum in an ejector-like structure in the top of the car, through which ejector the air is forced by the motion of the car.

In the accompanying drawings, Figure 1 represents a side elevation of a railway-car, showing the position of myimproved car-ventilators. Fig. 2 is a vertical transverse sec tion of the upper part of the car, drawn on a larger scale, so as to show the ventilators in end view and their transverse connectingtube in side View. Figs. 3 and 4. are vertical longitudinal sections of the ventilators, showing two (lifierent constructions of' the same.

Figs. 5 and 6 are vertical transverse sections of the ventilators, respectively on line 3 3, Fig. 3, and line 4 4, Fig. 4:.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents my improved car-ventilators, of which one is arranged at each corner of the car above the roof of the same, as shown in Fig. 1. Each ventilator A is constructed of a horizontal ejector a, having enlarged or trumpet-shaped ends a, which are covered by comically-shaped,

screens a by which dust and cinders are prevented from entering into the ejector. The horizontal ejector-tube a is provided with an opening a in its bottom part and with a flange a extending around said opening, said flange forming a seat by which the ejector a rests on the upper end of a vertical suctiontube B, that passes through the roof of the car to the inside of the same and that is firmly attached to the roof. The bottom of the suction-tube B is connected by a drain-pipe Z), which passes through the side wall of the car to the outside of the same, so as to conduct is attached to a socket d, that is supported on arms below the bottom opening a of the ejector-tube a. The lower end of the spindle d outside of the bottom of thevertical tube B is pivoted to two hand-levers (Z 61 by which the horizontal ejector-tube a can be rigidly locked to the suction-tube when the levers d d are pressed together or released from the same, so as to turn freely on the suctiontube B by moving the levers apart from each other, in which position the levers also serve for turning the ejector-tube a through an angle of one hundred and eighty degrees, so as to adjust it according to the direction in which the car is moved. After the proper position of the horizontal ejector-tubeais established it is locked firmly to the suction-tube B by pressing the levers d together, the upper ends of the same above the pivot-connection with the spindle b acting in the nature of cams on the bottom of the suction-tube for rigidly holding the ejector-tube a in position on the suction tube v B. In the horizontal ejector-tube a is arranged either a curved hood h or a conical nozzle n, that extends over the bottom opening a of the ejector-tube a, so that the latter serves in the nature ofan ejector when the air is forced by the motion of the car with considerable velocity through the ejector-tube a, creating thereby a partial vacuum in the suction-tube B, by which the vitiated and warm air is drawn out of the top part of the car and forced to the outside of the same. The lower ends of the suctiontubes B of the two ventilators A at each end ofthe car are connected by a transverse tube 0, which extends across the top part of the car, as shown in Fig. 2. The transverse tube C is perforated for the free egress or ingress of the air and provided at both ends, near its connection with the suction-tubes B, with damper-like valves f, which are set by means of levers f into open or closed position whenever it is desired to connect-one or both ventilators with the transverse tube 0 or disconnect it therefrom. At the center of the trans verse tube 0 is arranged a partition g, which divides the transverse tube 0 into two halves, one half communicating with the ventilator A at one side and the other half with the ventilator at the opposite side thereof.

In using my improved car-ventilator I prefer to use a pair-0t ventilators at the front end of the car for the purpose of introducing fresh air into the car, while another pair of ventilators is arranged at the rear end of the car for drawing out the Warm and vitiated air and conducting it to the outside. For this purpose it is necessary to turn the horizontal ejectortube a of thefront ventilators on the suctiontubes B in such a position that the nozzles 11 or hoods 72 are located in the direction in which the car is moving, so that the air that passes in through the screen at the end of the ejectortube a is forced through the nozzles or hoods and the suction-tubes B into the transverse tube C and distributed through the perfora- Lions of the latter to the interior of the car. The ventilators at the rear end of the car are adjusted for suction, their nozzles or hoods being located in the direction of the air-current that passes through the ventilators, so as toproduce a partial vacuu m andexhaustthereby the air from the top part of the car. In this manner the ventilators arranged at the front. and rear ends of the car act together, one introducing fresh air at the front end into the car, while the other exhausts the vitiated air at the rear end from the car. By the perforated transverse dist ributing-tubes the ventilation produced by the change of air is almost imperceptibly accomplished, so as not to annoy the passengers in the car. As long as the car is in motion a continuous ventilating action takes place, which is increased according to the speed at which the car is moved. \Vhen the car is moved in the opposite direction, the positions of the ventilators are changed by the mechanism before described in such a manner that the ventilators at the front end that were before at the rear end of the car are changed, so as to conduct the air to the inside of the car, While the ventilators at the rear endof the car are adjusted so as to produce a suction action and establish thereby the'ventilation through the car. If desired, the ventilators at both ends ofthe car can be set for suction, or both for the introduction of fresh air.

My improved ventilator can be applied at comparatively small expense to passenger and other cars, and can also be used as a single ventilator Without the transverse perforated tube forthe ventilation of water-closets, smoking-rooms, &c., or at the bottom of the cars.

Having thus described my invention, I claim as new and desire to secure by Letters Patv ent- The combination of a vertical air-tube, a horizontal ejector-tube mounted on the upper end of said vertical air-tube and adapted to swivel thereon, said ejector-tube having tiaring months at its opposite ends, a jet-tube or hood and a side opening opposite said vertical tube, a spindlepassing through said vercal tube and connected to the ejector-tube, and cam-levers pivoted to the lower end of the spindle for turning and locking the ejectortube.

In testimony that I claim the foregoing as my invention I have signed my namein presence of two subscribing Witnesses.

GEORGE IIOGG. lVitnesses:

PAUL GoEPEL, \V. REIMHERR. 

